Damper control for furnaces



- Oct, 7 1924. LSlLOOO H. w. NEAL DAMPER CONTROL I FOR FURNACE S Filed Dc. 24; 192:5

Patented @ets 7, 1924,

. UNITED vsraras lsagra fi @ma-.y

HARRY w. NEAL, or INDIANAPOLIS, INDIANA, assIeNoN To HALL-NIEALTURNACE COMPANY, or INDIANAPOLIS, INDIANA, A coItPonafrIoN on INDIANa.

naivirnn coN'raoL rea ruaNaciis.`

Al-lpplicaton filed December 24, 192,3, -Seral 110.662,519.

To all whom t may concern.;

Be it known that 1,1] HARRY W. NEAL, a citizen of the United States, residing at Indianapolis, in the county ofMarion and State of Indiana, have invented new, and useful Improvements in Damper'A Controls for Furnaces, of which the following is a specification.

This invention relates to improvements inmeans for the control ,of the damper in thesmoke pipe vof hot air furnaces which pipe is generally located at/or near .the rear ofthe furnace where it is not handily accessible from a front position of the caretaker, and the object of the invention is First, to provide means, manually operated from a position in front'of the furnace, for opening and closing the smoke pipe damper wherever located, and for retaining the damper at anydesired position.

Second, to provide means for locking the damper at any given position of adjustment.

Third, to provide an indicator at the front of the furnace which will. always show the position of the damper, and

Fourth, to provide a device of the above character that is inexpensive to `manufacture, easily installed at any time on furnaces now in common use, simple in its operation and durable.

I accomplish the above, and other objects which will hereinafter appear and which will be pointed out in the claims, by the mechanism illustrated in the accompanying drawing, in whichy Fig. 1 is a front elevation of a portable hot-air furnace provided with my invention. Fig. 2, is a side elevation of same with a portion of the smoke pipe in vertical section to disclose the damper mounted therein. Fig. 3 is a horizontal section of one side of the furnace taken on the line 3-3 of Fig. 2 showing my invention, and Fig, e is a fragment of a furnace casing with my damper-control mechanism installed.

Like characters of reference indicate like parts throughout the several views of the drawing.

I have illustrated my invention as applied to a cylindrically shaped portable hotair furnace of usual and well known construction, in which a fire-pot and combustion chamber 5 has a cast-iron front 6, with a fuel door 7 and dash door 8, a smoke discharge pipe 9 controlled by the well known butter-fly valve 10, having` va valve-stem`11, here vertically placed and projecting above the pipe for the attachment ythereto ofi a rocker-arm 12,by which the stemandvalve are moved. f l f- Af, cylindrical ,'sheetmetal'casing 13 `is attached by angle-bar 14C to onev of 4tbe outside vertical corners of the front 6, and curving thence around the member 5, is attachedgt'o the corresponding opposite cornerv ofthe front 6.V 1t is separated froml'the member 5 to provide the' usualhot-air space 14'? As rannte here shown, the sheet metal casing is formed inra" )lura'lit of sections 'oined b vertical l interlocking seams 13, wherein the sheetsare held by bolts 16 lfrom longitudinal dis` placeinentgand these seams lare turned outwardly of the casing inthe form of verticalA vand radially"disposedflangesn Bolted to one of the front angle-bars is a bracket 17, having a horizontally elongated slot 18, and brackets 19 and 20 are similarly bolted to the seam-flanges 15, on the same side of thefurnace as said angle-bar. Instead ofy a slot, each of the brackets 19 and 2() is provided with a round hole, in which, and also in the slot 1S, a curved rod 21, is mounted. preferably steel, so bent as to normally assume a curve of smaller radius when unrestrained than that compelled by the openings in the brackets in which it is mount-y ed, with the result that it bears against the inner end of the slot 18 vwhen the rod is unrestrained, but which can be sprung out to the outer end of the slot to the position shown in dotted line in Fig. 3.

,011e end of the rod 21 is connected by a link 22, with the outer end ofthe rocker-arm 12, whereby, by a longitudinal movement ofthe rod, the rocker-arm 12 will be correspondingly moved to rock the valve or damper 10.

To facilitatethe longitudinal movement of rod 21, it is provided with a handle 24 at its front end, here shown as a loopbent out of the material of the rod and .standing radially of the furnace.` The end 25 of the rod is continued inwardly of the loop into contact with the, front 6, against which it -is held normally by the spring-tension of the rod 21. The front 6 preferably has a series of corrirgations 26, and the tip of the end This rod 21 is of spring metal,

Ofthedaniper ae indicatedl in Fig. fi, thenytfolt open the' damper, thevendv 25 is` disengaged by manually pulling' outwardly on the handle 24. Thisl is permitted the Slotv 18,

and While the end is disengaged the rod 21` is pulled toward the position marked open-all of the Way, or for any fractional partl of the distancegae may be desired, and released, whereupon the rod Will kspringt-he endv 25 again into-,engagement with the corrugations 26; The damper will bei correspondingly opened by reason of the aboved-escribedconnection between it and' the rod 21;' and a' reverse operation will partially or entirely close' the damper, as the operator elect. n o

Having thus ful-ly describediny invention, What I cla-im as ne`r and Wish, to secure by Lettere Patent ofr the United States, is-fl: The ,oombination,, with an upright cylindrical furnace having front. doors and a rear smoke'pipe, of a` damper in [the pipe, Ine-ans for operating the ldamper comprising a'resilient'push and pull rod curved around one side of the furnace and having a` front end portion normally contacting the furnace by a spring-action of the rod, and a series of oorrugationsI on the furnace in the path of saidl frontV contacting petition to limit. the freer` pully and push moyeiient of therod by engagement with the spring-pressed end.

2. The coinbination, with a furnace having al sheet riietal' casing in a plurality of sections` joined by seams forming outside vertical flangesgolf a smoke-pipe, a butterfly damper in the pipe, a Stern, a rocker-arm attaohed'tofthesten, aL curved spring-bar passing from rear tol front of the furnace through holes in' said ia-ngeeon that side of the furnace Where the redis placed, all of said holeslnaling'a eloefsllidingfit With the bar exceptthey front'Y one vvhichvv is slotted liorizontally`, the? tensin' of the', spring-bar holdingV the bar'nornially attlie inner end of said Slot, the front end of the Spring-bar having. an extension normally contacting the furnace" byitheiplingaction of theI bar, and

al seriele ofQindentatinSon, the furnace to? engage' with the' end of the` bar extension and hold theflongitudinal adjustment of the bar, and a link connecting" the rear end of the spring-ban with" the rockerL-arn'i of the damper-stem. e

, ignfed at Indianapolie, Indiana, this 21st dalyV of December, 1923.

ARRY vv.' NEAL. 

